History Reference Source (EBSCO) This link opens in a new windowFeatures full text for more than 2,000 reference books, encyclopedias and non-fiction books, as well as full text for more than 120 history periodicals. Further, the database contains 59,640 historical documents; more than 50,000 biographies of historical figures; more than 110,200 historical photos and maps; and more than 80 hours of historical video.